- "GLOCK" is a federally registered trademark of Glock, Inc. or Glock Ges.m.b.H. DELTAC® has NO affiliation in any manner with, or otherwise endorsed by, Glock, Inc. or Glock Ges.m.b.H. The use of the word "GLOCK " on this page is merely to identify which firearm these parts or components are compatible with.